Flash-boiler.



INVQNTORI PATENTED MAY 9, 1905;

A. G. DAVIS.

FLASH BOLER.

APPLIOATION FILED M1141 Patented May 9, 19055.

i narrar tric,

CL'BFRLl G. DAVIS, OF SOI-IENEOTADY, NEXW YORK, ASSlGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEN YORK,

FLMSldMBOlLEl-"i,

SPECIFICATION forming part of Letters Patent No. 789,414, dated May 9, 1905.

Application filed January 1l, 1904. Serial No. 188,506.

To (til w27/.ont 'ft nt/ty con/cern,.-

Be it known that l, ALBERT G. DAVIS, aciti- Zen of the United States, residing at Schenectady, in the county of Schenectady and State of New York, have invented certain new and useful Improvements in Flash loilers, of which the following is a specilication.

In boilers of the flasher type, which are subjected to a high degree ot' temperature to 'IO etliect the superheating of the steam, the superheating-coils, due to the intense heat, are subject to relatively rapid deterioration as compared to the heating and vaporizing coil or coils, resulting' in occasional interruptions ot' the operation oil the boiler 'for the purpose oll renewing the supcrheating coil or coils when the same become defective. In automobile steam systems the renewing of defective superheating-coils is not a matter at all 2O times feasible-as, for instance, when the machine is in operation on the road. In order not to render the boiler wholly disabled under such emergency, my improved boiler is provided with a novel couj'iling device, by means of which the main coils can be connected directly to the steam-supply pipe leading to the engine, thereby cutting' out the leaky superheating-coils from the steam-generating system. At such times as the superlieating-coils 30 are disconnected the eiiiciency oi" the system is somewhat impaired; but the vehicle is operative, which is the main consideration.

lln carrying out my invention l provide a flash-boiler con'iprising a main coil for heating the feed-water and generating steam and a superheating-coil, together with a couplingspider connecting said main coil with said superheating-coil and with the supply-pipe to the engine. Forming a part oiI the coupling 40 are means ior placing the main coil in communication with the steam-supply pipe leading to the engine through said superheatingcoil or independently thereof, as the condition o'lI the boiler demands.

For a consideration oi" what lv believe to be novel in my invention attention is called to the accompanying description and claims appended thereto.

Yln the accompanying drawings, Figure l is a side elevation oii a flash-boiler having my invention in one oi its embodiments applied thereto. Fig. 2 is a vertical transverse section of the coupling-spider, taken on line 2 2 oi Fig. 1. Fig. 3 is a vertical section oi? a portion ot' the spider, taken on line 3 Z3 of Fig. 55 2, showing the connections when the superheating-coil is in operation. Fig. t is a similar section showing` the connections when the superheating-coil is cut out oi operation, and Fig. 5 is a perspective view of a valve-plug'. 60

Referring to the drawings, 'l represents a Hash-boiler situated above the usual lire-chamber, containing a burner 2 and its vaporizer. The main steam gel'ierating and heating coil 3 and the superheating-eoil ft are shown in dotted lines in Fig. l, and the superheating-coil is disposed below the main coil. ln other words, the coils are arranged in sections. For connecting the main coil or coils with the superheating coil or coils and the latter with the steam-supply pipe leading tothe engine* that is, in series relation-a coupling-spider or connector 5 is employed. This spider is composed of a central enlarged portion 6, having tubular arms 7, S, 9, and lO connected in the order named with the lower end ll ot' the main coils, the lower end 120i" the superheating-coils, the upper end 13 oi' said latter coils, and with the supply-pipe 14:, leading to the engine. The spide 1 5 is preferably, although 8O not necessarily, a drop-forging having bored arms, the bores thereof being suitably connected at their inner ends and are closed at their outer ends by screw-plugs. The outer ends ot' the arms are termed with threaded 85 bosses 15, having central apertures i6 communicating with bores of the arms, said bosses extending from the side ot' the spider opposite to that ot' the central enlarged portion 6. The bosses receive the ends ot' the coils, and 9o the latter are retained in place by means of dil'erentially-threaded sleeve -nuts 17, as clearly shown in Fig. 2. rlhe ends 11 12 13 oil the coils and the end ifi of the steam-supply pipe are threaded to receive the sleevenuts,which, in conjunction with the interiorly- C dan threaded bosses, form differential joints, and to insure steam-tight lits packings 18 are seated in the bosses, upon which the ends of the coils impinge. l

The inner ends of the bores ot' arms 7 and l0 communicate with each other, while the bore of arm 8 connects with the bore ot arm 7, and the bore of arm 9 connects with the bore of arm 10, as shown in Figs. 3 and 4. rIhis arrangement of the bore is a convenient form of carrying out the object of the connector or spider. Communication between the bores of the arms may be controlled by an interchangeable valve and blank plugs 19 and 20, respectively,which are seated in transverse bores or depressions 21, formed in the enlargement 6, the lower end of the depressions or bores being preferably7 tapered to receive the taper of the plugs. The plugs are retained by means et' screw-plugs Q2, that screw into the tapered bores or depressions. The valve-plugs 19, Fig. are provided with a transverse slot 23, that is adapted to register with the bores of the arms t'or permitting communication between the bores. Blank plugs 2O are shaped like the valve-plugs, so as to be interchangeable therewith when it is desired to cut off communication between any ot' the bores. I-Iowever, itis notnecessary to provide blank plugs, as the valve-plugs may be employed for cutting off communication between any of the bores simply by turning the latter plug so as to have its slot extend transversely to the bore of the arm. As shown in Fig. 3, the blank plug' prevents communication between the bores of arms 7 and 10, while the slotted valve-plugs permit communication between the bores ot' arms 7 and 8 and those ot' 19 and 9, so that the coils of the boiler are in series relation and constitute the complete generating system for producing superheated steam. The main coil is supplied with water from a pump or its equivalent in the usual manner, and the saturated steam generated therein passes to the superheating-coils through the tubular arms and 8. rI`he superheated steam passe-s to the steam-supply pipe la through the arms 9 and 10 and the valve between the same. Wlhile this is the normal circulatory course of the steam in the boiler, with the coils in series relation, the steam from the main coil or coils can be caused to pass directly to the steam-supply pipe leading to the engine independently or' the superheating-coils, as when the necessity arises for cutting the latter out or' service in case ot' accident. In order to cut out the su perheating-coil, the blank plug 2O between arms 7 and 10 is substituted for a slotted valve-plug, and the slotted valveplugs 19, between arms T and 8 and 10 and 9, are substituted for blank plugs, so that steam passes directly from the main generating-coil to the steam-supply pipe through the arms 7 and 10 and the intermediate slotted valveplug 19 The spider or connector 5 is located exterior of the shell or casing of the boiler, so as to be readily accessible for the purpose of interchangingthe plugs.

Boilers equipped with my invention are particularl y useful for automobile systems, wherein the high el'liciency of the flasher type of boiler is desired, at the same time having means for insuring the system from being wholly disabled upon critical deterioration otl the superheating-coils.

In accordance with the provisions of the patent statutes I have described the principle of operation ot' my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown is only illustrative and that the invention can be carried out by other means.

That I claim as new, and desire to secure by Letters Patent ot' the United States, is

1. In combination, a boiler composed of tubes arranged in sections and forming a single continuous passage, with a means for cutting out one ot' the sections.

2. In combination, a boiler composed of tubes arranged in sections and forming a single continuous passage, a burner situated at one end of the sections, and a means for cutting' out a section adjacent to the burner.

3. In combination, a'lire-chamber, a vaporiZing-coil in which the iow of Huid is toward the tire-chamber, a superheating-coil located between the vaporizing-coil and the tire-chamber, adischarge-pipe for the coil, and a means for connecting or disconnecting the superheating-coil to and from the vaporiZing-coil and the discharge-pipe.

a. In a boiler' of the flasher type, the combination of a main steam-generating coil having asingle passage, a superheating-coil, and a means for utilizing said main coil coperatively with said superheating-coil or independently thereof.

5. In aflash-boiler, the combination of main coils in which liquid ashes into vapor, superheating-coils, means for connecting said coils in series to form a single passage, and means for controlling the operative relation of said coils.

6. In a boiler, the combination of main vapor-generating coils, superheating-coils, a coupling device connecting said coils, and means in said device 'for placing' said coils in series connection or for cuttingI out of service said superheating-coils.

7. In a flash-boiler, the combination of a coil for heating the liquid and generating steam-vapor, a superheating-coil, a vaporsupply pipe, a coupling-spider, joints connecting the spider with the coils and vapor-supply pipe, and interchangeable plugs for controlling the operative relation ot' the coils to the vapor-supply pipe.

8. In a Hash-boiler, the combination of a IOO IIS

main Vapor-generating coil, a snperheatingcoil, a Vapor-supply pipe, a coupling-spider connected with the coils andthe supply-pipe, and interchangeable plugs adapted to be sccured in said coupling-spider for controlling the relation of the coils to the Vapor-supply pipe.

9. The combination, with aiash-boiler having a main vapor-generating coil and a superheating-coil andan inclosing shell, of a coupling-spider arranged exterior of the boilershell which is provided with tubular arms and a central enlarged portion, interchangeable plugs arranged in said central portion for controllingI the connection between the coils, and screw-threads for retaining the plugs on their seats.

10. A boiler comprising a single coiled conduit, and means for connecting the discharge end thereof at an intermediate point and cutting out the intervening portion.

11. A boiler comprising a continuous conduit, and means intermediate the ends thereol whereby the discharge end may be connected nearer to the receiving end.

12. A boiler comprising sectional tubes tit which are normally connected in series, and means for cutting' out one ol'I the said sections.

13. A boiler comprising sectional tubes which are normally connected in series, a burner which heats one tube more than the other, and means for cutting out said tube.

14. A boiler comprising a coil in which fluid Hows in one direction, a coil in which Huid Hows in the opposite direction, and means for connecting one coil with the discharge end of the boiler through the other coil or independently thereof.

15. The combination of a burner, with a boiler comprising a coil in which :fluid liows toward the burner, a coil in which Huid lows away from the burner, means for connecting the coils to cause the Huid to How successively through them, and means for cuttingout one of the coils.

1n witness whereof I have hereunto set my hand this 7th day of January, 1904.

ALBERT DAVIS.

fi tn esses:

BENJAMIN B. HULL, HELEN Onronn. 

